民用紫外可見(jiàn)分光光度計(jì)性?xún)r(jià)比客戶(hù)至上上海儀電分析儀器供應(yīng)-b2b網(wǎng)站_b2b電子商務(wù)平臺(tái)【買(mǎi)產(chǎn)品】-上?？谄蚴称酚邢薰?/title><meta name="description" content="紫外可見(jiàn)分光光度計(jì)之比色皿的選擇與使用小技巧一直以來(lái)都認(rèn)為比色皿洗滌不干凈會(huì)造成很大實(shí)驗(yàn)誤差，才發(fā)現(xiàn)原來(lái)比色皿選擇不當(dāng)也能造成不可預(yù)測(cè)的誤差。在此，就小結(jié)下有關(guān)如何正確選擇比色皿、比色皿使用注意事項(xiàng)以及比色皿的洗滌方法。比色皿透光面是由能夠"><meta name="keywords" content="民用紫外可見(jiàn)分光光度計(jì)性?xún)r(jià)比,紫外可見(jiàn)分光光度計(jì)"><link rel="canonical" href="http://www.cdcfah.com/"/><meta name="applicable-device" content="pc"><link rel="shortcut icon" href="/static/new_net_01/images/favicon.ico"><link rel="stylesheet" href="/static/new_net_01/css/slick.css" /><link rel="stylesheet" href="/static/new_net_01/css/addnew.css"><link rel="stylesheet" href="/static/new_net_01/css/sidenav.css"><link rel="stylesheet" href="/static/new_net_01/css/style.css" /><link rel="stylesheet" href="/static/new_net_01/css/tab.css"><link rel="stylesheet" href="/static/new_net_01/css/404.css"> 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onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="jdfmrov" class="smallimg"><div><p class="pic"><img src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637396593980700101/5381945.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="oczwqmj" class="content"><p><span>需求數(shù)量：</span>0</p><p><span>價(jià)格要求：</span>面議</p><p><span>所在地：</span>上海市</p><p><span>包裝要求：</span><span style="color: #f30;"></span></p><p><span>產(chǎn)品關(guān)鍵詞：</span>民用紫外可見(jiàn)分光光度計(jì)性?xún)r(jià)比,紫外可見(jiàn)分光光度計(jì)</p><p><span>***更新：</span>2020-11-05 06:22:35</p><p><span id="click" >瀏覽次數(shù)：0次</span></p><a rel="nofollow" class="button">聯(lián)系我們</a></div></div><div id="339v2me" class="rightbox"><h3>公司基本資料信息</h3><p style="border:0;"><a rel="nofollow">上海儀電分析儀器有限公司</a></p><p><span>聯(lián)系人：</span>薛馬駿</p><p><span>郵箱: </span>ydfxwx@qq.com</p><p><span>電話(huà): </span>18001994173</p><p><span>傳真: </span>021_</p><p><span>網(wǎng)址: </span>http://www.inesa-a.com</p><p><span>手機(jī): </span>021-34530361</p><p><span>地址: </span>徐塘路88號(hào)7幢4層、9幢</p><p>[當(dāng)前離線(xiàn)] <a rel="nofollow"> [加為商友] </a><a rel="nofollow"> [發(fā)送信件] </a></p></div></div><div id="rvsuwtl" class="page-proshow02"><p class="title">詳細(xì)說(shuō)明</p><div id="wv2qamy" class="box"><p><p> 紫外可見(jiàn)分光光度計(jì)之比色皿的選擇與使用小技巧 </p> <p> 一直以來(lái)都認(rèn)為比色皿洗滌不干凈會(huì)造成很大實(shí)驗(yàn)誤差，才發(fā)現(xiàn)原來(lái)比色皿選擇不當(dāng)也能造成不可預(yù)測(cè)的誤差。在此，就小結(jié)下有關(guān)如何正確選擇比色皿、比色皿使用注意事項(xiàng)以及比色皿的洗滌方法。 </p> <p> 比色皿透光面是由能夠透過(guò)所使用的波長(zhǎng)范圍的光的材料制成。在200-350nm工作的比色皿適用于紫外區(qū),必須使用石英或熔熔硅石制成透光面的石英比色皿。(注：熔熔硅石的還真沒(méi)見(jiàn)過(guò)，只用過(guò)石英的)石英比色皿既可用于紫外區(qū)又可用于可見(jiàn)區(qū)，但是價(jià)格一般比較貴，所以要根據(jù)使用波長(zhǎng)選擇比色皿，如果不用紫外區(qū)的話(huà)，用普通玻璃比色皿就行了，一則浪費(fèi)沒(méi)必要，二則，嘿嘿，摔碎了也不心疼，哈哈，民用紫外可見(jiàn)分光光度計(jì)性?xún)r(jià)比，民用紫外可見(jiàn)分光光度計(jì)性?xún)r(jià)比。而普通硅酸鹽光學(xué)玻璃制成的透光面的比色皿，民用紫外可見(jiàn)分光光度計(jì)性?xún)r(jià)比,只能用于350nm至1000nm的可見(jiàn)區(qū)。紫外可見(jiàn)分光光度計(jì)在開(kāi)機(jī)前將樣品室內(nèi)的干燥劑取出，儀器自檢過(guò)程中禁止打開(kāi)樣品室蓋。民用紫外可見(jiàn)分光光度計(jì)性?xún)r(jià)比</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="民用紫外可見(jiàn)分光光度計(jì)性?xún)r(jià)比,紫外可見(jiàn)分光光度計(jì)" src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637396593980700101/5381945.png"></div><p> 如何正確使用752N紫外可見(jiàn)分光光度計(jì) </p> <p> A：在使用紫外可見(jiàn)分光光度計(jì)時(shí)候，設(shè)備儀器使用之前，一定需要能夠把樣品室內(nèi)存放的防潮劑給拿出來(lái)，且在設(shè)備正常運(yùn)轉(zhuǎn)檢查時(shí)候也不能開(kāi)啟樣品室蓋；在檢查時(shí)候需注意比色皿當(dāng)中的液體要能占總體積的百分之六十六到百分之八十比較好，千萬(wàn)不能讓液體太多以至于液體外泄直接腐蝕儀器設(shè)備。 </p> <p> 當(dāng)然在進(jìn)行正常檢測(cè)時(shí)候，也要能確保比色皿干凈，當(dāng)發(fā)現(xiàn)內(nèi)壁上有液滴就許使用專(zhuān)業(yè)的紙張給擦拭干凈，建議大家千萬(wàn)不要使用手直接擦拭，以免造成對(duì)手的傷害。 </p> <p> B：在使用紫外可見(jiàn)分光光度計(jì)時(shí)，儀器設(shè)備在正常運(yùn)轉(zhuǎn)的時(shí)候，一定要嚴(yán)禁把液體溶劑給直接放置于儀器的表層上，如果發(fā)現(xiàn)有溶劑液體出現(xiàn)外泄的情況，一定要進(jìn)行及時(shí)的清潔和處理。 </p> <p> C：當(dāng)使用紫外可見(jiàn)分光光度計(jì)檢測(cè)完畢后，還需要能夠及時(shí)把比色皿內(nèi)的液體給妥善處理掉，并還需要能夠使用蒸餾水給徹底清潔干凈，同時(shí)將比色皿進(jìn)行倒置晾干處理；全部工作完成后還需把設(shè)備儀器電源給關(guān)閉，再將防潮劑放入到樣品室內(nèi)并做好防塵處理才好。實(shí)驗(yàn)室紫外可見(jiàn)分光光度計(jì)排名通常我們所理解的單色光，只是存于理想狀態(tài)下，實(shí)際上得到的“單色光”，是帶有一定寬度和波長(zhǎng)范圍的譜帶。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="民用紫外可見(jiàn)分光光度計(jì)性?xún)r(jià)比,紫外可見(jiàn)分光光度計(jì)" src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637396593808795839/2949755.png"></div><p> <br /> </p> <p> 自從60年前紫外分光光度計(jì)出現(xiàn)在實(shí)驗(yàn)室的工作臺(tái)之后，已經(jīng)形成了一種能解決大部分難題的儀器，從單一波長(zhǎng)的測(cè)量到高性能多光譜的測(cè)量分析。實(shí)驗(yàn)室選擇時(shí)需要根據(jù)自己實(shí)驗(yàn)室的需要和目的用途來(lái)考慮，光學(xué)構(gòu)造和光源、探測(cè)方法、樣品類(lèi)型和數(shù)據(jù)處理等都是要考慮的因素。 </p> <p> <br /> </p> <p> 光學(xué)構(gòu)造（OPTICALCONFIGURATION） </p> <p> <br /> </p> <p> 一般來(lái)說(shuō)，紫外光分光光度計(jì)分為單光束和雙光束兩類(lèi)。顧名思義，單光束型主要是依賴(lài)單束光進(jìn)行測(cè)量。一束給定波長(zhǎng)的光通過(guò)對(duì)照物，然后再通過(guò)實(shí)際樣品溶液，就能得到吸光結(jié)果。 </p> <p> <br /> </p> <p> <br /> </p> <p> 雙光束型則是通過(guò)一個(gè)斬光輪（mirroredchopperwheel）將一束光分成兩束，分別測(cè)量對(duì)照樣品和實(shí)際樣品?？梢訫IN光漂移（lampdrift）和減少測(cè)量時(shí)間。一些雙光型光度計(jì)不利用斬光輪，而是利用一種光束分光器來(lái)代替，將一束光分成兩束平行的光然后同時(shí)測(cè)量對(duì)照樣品和目的樣品。因?yàn)樵黾恿藴y(cè)量的速度，所以雙光束分光光度計(jì)在測(cè)量一些溶液隨時(shí)間動(dòng)態(tài)變化的研究中大有用處。 </p> <p> <br /> </p><p style="text-indent:25px">使用紫外可見(jiàn)分光光度計(jì)進(jìn)行定量和定性分析需注意以下一些問(wèn)題：1吸光度讀數(shù)范圍：吸光度測(cè)量誤差在透過(guò)率過(guò)大或過(guò)小時(shí)都會(huì)變大，為了滿(mǎn)足定量分析的誤差要求（<5%），在定量分析時(shí)要求吸光度應(yīng)在一定的范圍內(nèi)，這個(gè)范圍的具體值與儀器性能有關(guān)，主要是與紫外可見(jiàn)分光光度計(jì)檢測(cè)系統(tǒng)噪聲大小有關(guān)，但通常都在0.1~1.0范圍內(nèi)，如果儀器的檔次更低，則范圍更窄。根據(jù)朗伯比爾定律，影響吸光度大小的因素主要是樣品摩爾吸光系數(shù)，濃度和比色皿光程。實(shí)驗(yàn)中吸光度過(guò)大的樣品可通過(guò)稀釋樣品使吸光度到所需范圍內(nèi)。如果樣品不能稀釋?zhuān)梢愿挠霉獬梯^小的比色皿減小吸光度。吸光度過(guò)小的樣品可使用光程較大的比色皿以增大吸光度。紫外分光光度計(jì)的帶寬（bandwidth）很大程度上依賴(lài)于單色儀的狹縫的寬度。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="民用紫外可見(jiàn)分光光度計(jì)性?xún)r(jià)比,紫外可見(jiàn)分光光度計(jì)" src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637396592216930546/1658567.png"></div><p> 光柵實(shí)現(xiàn)上就是一系列等寬、等距離的平行狹縫，它是利用光的衍射與干涉作用制成的。光柵作為色散元件具有不少獨(dú)特的優(yōu)點(diǎn)，光柵單色器的分辨率比棱鏡單色器的分辨率高，可精確到0.2nm，而且可用的波長(zhǎng)范圍也比棱鏡單色器的范圍寬。所以，目前生產(chǎn)的紫外可見(jiàn)分光光度計(jì)大多采用光柵作為色散元件。 </p> <p> 吸收池是用于盛裝待測(cè)液并決定待測(cè)溶液透光液層厚度的器皿，又稱(chēng)比色皿。吸收池一般為長(zhǎng)方體，也有圓形或其它形狀的。其底及兩側(cè)為毛玻璃，另兩面為光學(xué)透光面。根據(jù)光學(xué)透光面的材質(zhì)，吸收池又可分為玻璃吸收池和石英吸收池兩種。玻璃吸收池用于可見(jiàn)光區(qū)測(cè)定，石英吸收池用于紫外光區(qū)的測(cè)定。吸收池的規(guī)格以光程為標(biāo)志。常用的吸收池規(guī)格有0.5cm、1.0cm、2.0cm、3.0cm、5.0cm等。實(shí)驗(yàn)室研究人員希望省錢(qián)購(gòu)入專(zhuān)門(mén)儀器定量核酸、蛋白或者細(xì)菌的生長(zhǎng)情況。材料紫外可見(jiàn)分光光度計(jì)代理</p><p style="text-indent:25px">紫外分光光度法是根據(jù)物質(zhì)的吸收光譜，來(lái)研究物質(zhì)的成分、結(jié)構(gòu)和物質(zhì)間相互作用的有效手段。民用紫外可見(jiàn)分光光度計(jì)性?xún)r(jià)比</p><p> 紫外可見(jiàn)分光光度計(jì)的軟件功能可以極大地提升儀器的使用性能和價(jià)值，現(xiàn)代分光光度計(jì)生產(chǎn)廠(chǎng)商都非常重視儀器配套軟件的開(kāi)發(fā)。除了儀器控制軟件和通用數(shù)據(jù)分析處理軟件外，很多儀器針對(duì)不同行業(yè)應(yīng)用開(kāi)發(fā)了專(zhuān)用分析軟件，給儀器使用者帶來(lái)了極大的便利。 </p> <p> 紫外可見(jiàn)分光光度計(jì)的結(jié)構(gòu)一般地，紫外可見(jiàn)分光光度計(jì)主要由光源系統(tǒng)、單色器系統(tǒng)、樣品室、檢測(cè)系統(tǒng)組成，如圖1所示。光源發(fā)出的復(fù)合光通過(guò)單色器被分解成單色光，當(dāng)單色光通過(guò)樣品室時(shí)，一部分被樣品吸收，其余未被吸收的光到達(dá)檢測(cè)器，被轉(zhuǎn)變?yōu)殡娦盘?hào)，經(jīng)電子電路的放大和數(shù)據(jù)處理后，通過(guò)顯示系統(tǒng)給出測(cè)量結(jié)果。民用紫外可見(jiàn)分光光度計(jì)性?xún)r(jià)比</p><p style="text-indent:25px">上海儀電分析儀器有限公司致力于儀器儀表，以科技創(chuàng)新實(shí)現(xiàn)高品質(zhì)管理的追求。儀電分析擁有一支經(jīng)驗(yàn)豐富、技術(shù)創(chuàng)新的專(zhuān)業(yè)研發(fā)團(tuán)隊(duì)，以高度的專(zhuān)注和執(zhí)著為客戶(hù)提供分光光度計(jì)，氣相色譜，原子吸收，食品安全。儀電分析始終以本分踏實(shí)的精神和必勝的信念，影響并帶動(dòng)團(tuán)隊(duì)取得成功。儀電分析創(chuàng)始人湯志東，始終關(guān)注客戶(hù)，創(chuàng)新科技，竭誠(chéng)為客戶(hù)提供良好的服務(wù)。</p></p><br /><p>文章來(lái)源地址: http://www.cdcfah.com/cp/1856916.html</p></div></div></div></div></div><div id="p2lnz7a" class="page-right twoColRt"><div id="mbylnuw" class="box01 margin10 clearfix"><h3><a href="http://www.cdcfah.com/cp/">猜你喜歡</a></h3><div id="bgjwn22" class="recomPic likePro"><a 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